S135   10 0321

Lab JC21-34 Phase Difference in a Center-Tapped Xfmr Secondary
Real Components   10 points  

OEES 135/OEET  210

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Note: If you smell burning insulation, see smoke, or if the transformer gets hot, unplug the transformer immediately.
  1. Use a breadboard to connect together the center two wires on a transformer with dual secondary windings.
  2. Connect an alligator ground clip on a scope probe to these center wires.
  3. Connect the channel 1 scope probe to one of the outer secondary wires.
  4. Connect the channel 2 scope probe to the other outer secondary wire.
  5. Adjust the scope so that you can see one or two sine wave cycles.
  6. Position one trace in the upper part of the screen and the other trace in the lower part of the screen.
  7. Below, make a rough sketch of the two waveforms.
  8. What is the phase angle between the two waveforms? ______________



 
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